Home/Resources/Lines of credit

How lenders decide your credit limit

By Klark Sparks  ·  September 14, 2026  ·  6 min read

The short answer

Most limits are sized against revenue and cash flow — commonly a proportion of monthly deposits — then adjusted for credit, time in business, existing debt and industry. If the number comes back low, the usual causes are thin documented cash flow, high existing debt service, or a short trading history.

Part of our guide to Lines of Credit — what it is, what it costs, and who it suits.

Not sure this is the right product at all? The Idaho small business funding guide covers every option an Idaho business has.

You ask for $250,000 and are offered $60,000. It feels arbitrary. It is not, and understanding the arithmetic tells you what to change.

The starting point is your deposits

Most working capital lenders size a facility against revenue, usually expressed as a proportion of average monthly deposits over a recent window. That is the anchor. Everything after it is adjustment.

Which means the first thing to check is whether your deposits actually reflect your revenue. Businesses that run income through multiple accounts, take significant payment outside the main account, or bank irregularly routinely look smaller than they are. That is a documentation problem, not a credit problem, and it is fixable.

Then the adjustments

  • Debt service coverage. Existing loan payments come off the available capacity first. A business already carrying significant debt has less room regardless of revenue.
  • Time in business. Under two years compresses the limit almost everywhere. Under six months rules out most conventional facilities entirely.
  • Personal credit. For a small business this moves both approval and size, because you are guaranteeing it.
  • Industry. Some sectors carry restrictions no amount of revenue overcomes, and knowing that in advance saves wasted applications.
  • Volatility. Even revenue is treated more generously than the same annual total arriving in violent swings.
  • Collateral. A secured facility is generally sized larger than an unsecured one.

Why growing businesses get squeezed

There is a trap here worth naming, and Jerome and Twin Falls are full of it. A carrier or supplier growing fast has cash tied up in receivables, which makes the bank balance look thin. The limit is sized off that thin picture. But the reason it is thin is the growth the credit was meant to fund.

This is precisely where invoice factoring earns its cost. It is sized against your invoices rather than your balance sheet, so it scales with the growth instead of being capped by its symptoms. Expensive compared with a bank line; frequently the only thing that actually fits.

What moves the number

  1. Run all revenue through one business account, consistently, for several months before applying.
  2. Clear or consolidate small debts. Each one consumes coverage out of proportion to its size.
  3. Apply after your strongest months rather than your weakest.
  4. Offer collateral if you have it and are comfortable committing it.
  5. Improve personal credit first if it is the binding constraint — a few months of work often changes the answer more than anything else on this list.
If the limit comes back low, ask what drove it. Lenders will usually tell you, and the answer determines whether this is a three-month fix or a different product entirely.

A word on asking for too much

Requesting a figure far above what your revenue supports does not anchor the negotiation upward. It reads as a business that has not done the arithmetic, and it can affect how the whole file is received. Ask for something defensible and grow it — increases on a well-managed facility are routine, and far easier than a first approval.

Common questions

Can I increase my limit later?
Usually, and it is far easier than the original approval. Lenders like to see a facility used and cleared repeatedly. A year of drawing and repaying cleanly is the strongest case you can make for more.
Why does my existing equipment loan reduce my limit?
Because debt service coverage is calculated across all your obligations. Every existing payment reduces the cash available to service new debt. It is not a penalty on the equipment loan; it is arithmetic.
Does it help to bank with the lender?
Sometimes. An existing relationship gives the lender visibility into your deposits and can smooth the process. It rarely overcomes a fundamental sizing constraint, but it does no harm.
What if I need more than anyone will offer?
Look at whether a different product fits the underlying need — factoring for receivables-driven growth, equipment financing for assets, or a term loan for a defined project. A limit that is too small is often a sign the need was not really working capital.

Want this applied to your actual numbers?

Reading about it only gets you so far. One short application, a soft credit pull, and a straight answer about what fits.